Showa-Era Wafu Pasta
和風パスタ·(wafū pasuta)
One-Bowl Donburi & Noodle Fixes
If you grew up in a Japanese-American household, the smell of butter and soy sauce hitting a hot pan is the smell of home. Long before Italian food was fetishized for regional purity, post-war Japan invented its own brilliant genre of pasta. Born in a tiny Tokyo hole-in-the-wall in 1953, Wafu pasta was designed to be eaten with chopsticks, slurped like udon, and seasoned with the holy trinity of the Japanese pantry. This homage to the legendary Showa-era kissatens utilizes the kogashi shoyu technique—scorching soy sauce on the edge of the pan to create a smoky caramelization—and relies on a brilliant grandma trick: a pinch of kelp tea powder to deliver a massive hit of umami without watering down the sauce. It is fast, deeply savory, and requires nothing more than a quick trip to a standard supermarket.
Before you start
Move quickly.
Wafu pasta moves incredibly fast once the noodles hit the water. Have your mushrooms torn, bacon chopped, garlic minced, and sauces measured and standing by the stove before you drop the pasta.
Ingredients
- dried spaghetti7 oz
- kosher salt1 tbsp
- thick-cut bacon2 oz
- garlic clove1 large
- olive oil1 tbsp
- shimeji mushrooms3 1/2 oz
- fresh shiitake mushrooms3 1/2 oz
- green bell pepper1/2 med
- unsalted butter1 1/2 tbsp
- Japanese dark soy sauce1 1/2 tbsp
- kombu-cha powder or granular hondashi1 tsp
- starchy pasta water1/4 cup
- kizami nori1 tbsp
- black pepper1/4 tsp
- shiso leaves2 small
Method
- 01
Boil the pasta exactly one minute shy of al dente.
Bring a large pot of salted water to a rolling boil. Drop in the spaghetti and set your timer for exactly one minute less than the package instructions. The pasta will finish cooking in the pan, absorbing the delicious sauce.
- 02
Render the bacon and aromatics.
While the pasta boils, place a large frying pan over medium heat. Add the olive oil, bacon, and garlic. Cook slowly for 3 to 4 minutes until the fat renders from the bacon and the garlic turns a fragrant, pale gold. Do not let it burn.
- 03
Sauté the mushrooms and peppers.
Toss the shimeji, shiitake, and green bell pepper into the pan. Sauté for 2 to 3 minutes until the mushrooms have softened and taken on a slight color, acting like little sponges to soak up the garlic and pork fat.
- 04
Emulsify the sauce base.
When the pasta is about two minutes away from being done, carefully scoop a quarter cup of starchy boiling water from the pot and pour it into the frying pan. Swirl vigorously until the water and fat mix to create a slightly cloudy, cohesive base.
- 05
Add the pasta and umami boosters.
When the pasta timer goes off, use tongs to pull the spaghetti directly from the water into the frying pan. Add the butter and the kombu-cha powder, tossing vigorously to combine.
- 06
Scorch the soy sauce using the kogashi technique.
Push the pasta and mushrooms slightly to the center of the pan to expose the hot outer edges. Pour the soy sauce directly onto the bare, hot metal edge of the pan. It will immediately bubble, smoke, and caramelize. Quickly toss the pasta through this bubbling soy sauce to coat every strand.
- 07
Toss until glossy and serve immediately.
Toss everything together for 30 to 45 seconds until the sauce has thickened and the pasta is perfectly coated. Transfer to warm bowls and top generously with the shredded nori, a few twists of black pepper, and the shiso leaves. Wafu pasta waits for no one.
Notes
The magic of Kombu-cha.
Do not confuse this with the fizzy fermented drink. Kelp tea powder is pure, unadulterated glutamic acid—an invisible, savory backbone that elevates the soy sauce and mushrooms to kissaten-level perfection. If you can't find it, granular Hondashi is an acceptable, slightly fishier substitute.
The pan makes the dish.
For the kogashi shoyu (charred soy sauce) technique to work, the pan must retain heat on its edges. A wide stainless steel skillet, a well-seasoned cast iron, or a carbon steel wok is ideal. Teflon will mute the smoky caramelization.
From Cook Japanese in America.